Prokaryotes (part 1) Flashcards
Average size of Prokaryote
0.2 - 1.0 micrometer x 2-8 micrometer
Calcifying nanoparticles
Nanobacteria
Structures found on meteorite fragment
Nanobes or Nanobacteria
Basic shapes of prokaryotes
Coccus
Bacillus
Spiral
Round but can be oval, elongated, or flattened on one side
Coccus
Example of coccus
Diplococcus pneumoniae
Neisseria gonorrhoeae
Rod-shaped
Bacillus
Examples of bacillus
Escherichia coli
Bacillus anthracis
Have one or more twists
Never straight
Spiral
Curved rods
Vibrio
Ex: Vibrio cholerae
Thick, helical shape, like a corkscrew, and fairly rigid bodies
Spirillum
A thin, flexible spiral
Spirochete
Ex:
Treponema pallidum
Leptospira interrogans
Unusual shapes
Fruiting bacteria Stalked bacteria Budding bacteria Filamentous Wall-less, pleomorphic Pleomorphic Fusiform/ spindle-shaped, filamentous Rosette formation
Example of fruiting bacteria
Myxobacter
Example of stalked bacteria
Caulobacter
Example of budding bacteria
Hyphomicrobium
Example of filamentous shaped
Cynobacteria
Actinomycete
Example of wall-less, pleomorphic
Mycoplasma
Example of pleomorphic
Rhizobium
Example of fusiform/spindle-shaped, filamentous
Fusobacterium
Example of rosette formation bacteria
Caulobacter
Nutritional Types
Photoautotroph
Photoheterotroph
Chemoautotroph
Chemoheterotroph
Energy source is Sunlight
Photoautotroph
Photoheterotroph
Carbon source is co2
Photoautotroph
Carbon source is organic materials
Photoheterotroph
Energy source is inorganic materials
Carbon source is co2
Chemoautotroph
Energy and carbon source is organic compounds
Chemoheterotroph
Extracellular Stryctures
Glycocalyx
Flagella and Archaella
Axial Filaments
Pili/Fimbriae
Meaning sugar coat
Made inside the cell and secreted to the cell surface
Glycocalyx
Importance of glycocalyx
Protection Enhances virulence of bacteria Important component in biofilms Helps in attachment Source of nutrition during starvation
Types of Glycocalyx
Capsule
Slime Layer
Extracellular polymeric substance
S Layer
Well organized and not easily washed off
Capsule
Unorganized, diffused (loose) and easily removed
Slime layer
Helps cells in a biofilm attach to their target environment and to each other
Extracellular polymeric substance
Example of a biofilm
Dental plaque
Proteins or glycoproteins that are regularly structured
S layer
Thread-like locomotor appendages
Flagella
Parts of Flagella
Filament
Basal body
Hook
Longet portion of flagella
Filament
Part of a flagella that is embedded in the cell
Basal body
Part of a flagella that is short, curved segment which links the filament to the basal body
Hook
Arrangement of bacterial flagella
Peritrichous
Monotrichous and Polar
Lophotrichous and Polar
Amphitrichous and Polar
Movement of flagella
Run or swim
Tumble
Swarm (wavelike)
A flagellar protein useful for distinguishing among serovars, or variations within a species, or gram negative bacteria
H antigan
Flagellar version in archaea
Have same functions as flagella and pili
Archaealla
Glycoproteins in Archaellins
Archaellins
Hair-like appendages in many gram negative bacteria
Can reach up to 1,000/cell
Aid in attachment
Fimbriae
Longer than fimbriae and number only one or two per cell
Involved in DNA transfer
Involved in motility
Pili
Protein found in fimbriae and pili
Pilin